Automatic heat-controller.



PATENTED JAN. 22, 1907.

J. JESSEN. AUTOMATIC HEAT CONTROLLER.

APPLICATION FILED 11017.22, 1904.

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No. 841,978. PATENTED JAN. 22,1907.

J. JESSBN. AUTOMATIC HEAT CONTROLLER.

APPLIOAT ION FILED NOV. 22, 1904.

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PATENTED JAN. 22, 1907.

J. JESSEN. AUTOMATIC HEAT CONTROLLER.

APPLICATION TILED NOV. 22, 1904.

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J. JBSSEN. AUTOMATIC HEAT CONTROLLER.

APPLICATION I'ILED NOV. 22, 1904.

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W1 TNE 5. .5 MWL PATENTED JAN. 22, 1907.

J. JESSEN. AUTOMATIC HEAT CONTROLLER.

APPLICATION FILED NOV. 22, 1904.

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mar-:4 cya' N0. 841, 978. PATENTED JAN. 22, 1907.

J. JBSSEN. AUTOMATIC HEAT CONTROLLER.

APPLICATION FILED NOV. 22, 1904.

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chemicals,

JAMES JEssEN, OF MINNEAPOLIS, =MINNEOTA. I

i AUTOMATIC HEAT-CONTROLLER.

Specification of Letters iatent.

Patented Jan. 22, 1907".

Application filed November 22, 1904.' Serial No. 233, 822.

To all whom it, may concern.-

Be ,itknown that 1, JAMES J ESSEN, of Minneapolis, county of Hennepin, State of Minnesota, have invented certain-new and useful Improvements in Automatic Heat-Controllers, of which the follow ng is a specification.

My invention relates particularly to heatcontrollers for pasteurizulg andother fluidtreatlng machines. k The object I have'in view is to provide means whereby the fluid treated in such machines may be automatically discharged from the machine at a constant predetermined temperature independent of varying steam or-fluid supply; further, to provide a device or instrument which may be attached to any machine or installed separate and which will be extremely sensitive, accurate, inexpensive, and easily detachable for the purpose of cleaning the parts exposed. to the fluids. v

With these objects in view Iemploy no fluids, or anything that is. unreliable and will frequently need replacing, but confine myself to simple mechanical cn structions.

The invention consists in general of means for exposingthe heated fluid directly to the solid surface of two columns of diflerent linear expansive quality and applying this difference in expansion and contraction of the columns to'act through suitable cofiiperating parts directly upon either the heat-supply valve or the inlet-valve for the fluid to be heated, or both.

In most machines the control of the heatsupplyi'ng medium. alone is sufficient to keep the fluid heated or treated at the desired uniform temperature.

. Further, I provide means whereby the least perceptible change in temperature in the fluid discharged from the machine will simultaneously take effect on the supplyvalves of either the heat-ed or the heating medium and correct the change, While at the same time its range will be great enough to cover all the variations in both the heated or heating mediums supply within the scope oi ordinary practice and keep the temperature of the fluid steady-at the degree of heat to which the instrument has been set.

My invention consists more specifically in certain constructions and combinations, as set forth in the annexed specification and more particularly pointed out in the claims.

taken in connection with the accompanying drawings, in which- Figure 1 is a partial end view of a pasteurizer having my device attached thereto. Fig. 2 is a vertical section on the line as :c of "Fig. 1 Fig. 3 is a similar section on the line .2 z of Fig. 2. Fig. 4 is a section on the line m m of Fig. 2. Fig. 5 isa vertical section on is a sect on on the line y y of Fig. 5. Fig. 7 is a horizontal section on the line 1:. n of Fig. 3. Fig. 8 is a similar section on the line is k of Fig. 3. Fig. 9 is a modified formof instru nient, showing it asalso embodying a temperature indicator. Fig. 10 is a section on the line 1" 1" of Fig. 9. Fig. 11 shows a preferred form Ofvalve-controlling mechanism. Fig. 12 shows means for also controlling-the supply. Fig. 13 is a modified form of the valve-controlling mechanism. Fig. 14 shows the instrument as a combined heat indicator and controller applied to a fluid-treating ma-v chine. Figs. 15 and 16 are details of the adjusting throw deviceattached to the operating-shaft. Fig. 17 is partially in section, showing the means for supplying fluid to be treated to the apparatus.

In the drawings, 2 represents a pasteurizer or other fluid-heated machine discharging the heatedfluid through a pipe 3. Usually in this class'of machines a thermometer4 is insertedin the discharge-pipe whereby the temperature may be read.

4 5 is the steampipe that admits steam to .the machine for. the purpose of heating the fluid, and 6 is a hand-operated valve by which the steam may be shut off -when the machine is not in use. I

A suitable bracket 8, the form of which may'vary for different classes of machines, is secured to the pasteurizer 2 and supports the casing!) of the instrument.

A hollow column vor pipe 10, preferably of steel or other material of inferior expansive power, is secured by a suitable detachable coupling 1]. to the discharge pipe 3. ASlIIlllarcoupling 12 connects the pipe 10 to a pipe 13, leading away from the machine.

Referring to Figs. 2 and 3', the pipe 10 is shown detachably secured to an extension of the casing 9 by a swinging clamp 14, provided'with a thumb-screw 15. Dowel-pins 16 are arranged between the upper'part 17 of the pipelO and the casing 9 and serve to althe line 19 vp of Fig. 3 on a larger scale. Fig; 6

fluid-supply in connect on with-the steam- 'Lugs serve to guide the column 22 to a central position when it is inserted in the pipe 16. The spindle 20 has, preferably,

closed bearings .26 at one side of the pipe 10 and at the other side it passes through the wall of the pipe-and is provided on the outside with an annular shoulder or seat 27, that is adapted to make a tight joint with a simi lar seat on the pipe 10. (See Figs. 2 and 8.)

For convenience I prefer to arrange a lead gasket .28 between the-two seats and. provide.

an adjustable screw 29. in the casing 9, by means of which the spindle 20 is adjusted and held against the gasket 28.

A screw 31 keeps the spindle 20 in place when the pipe 10 is removed from the casing 9. A tailpiece 32 projects downward from the spindle 20'within the casing 9 and engages an arm-34 by means of an adjusting thumb-screw 35. (See Fig. 4.) The arm'34 is supported on the stem of the screw 29 and has a lug 36 engaging the thumb-screw. 35, by which the parts may be adjusted to cor.- trol the fluids to any desired temperature, as

- hereinafter described. The arm 34 extends Holler-bar 40 has connectionsto- 1 trolhng steam-valve 43.-

to the lower part of the'casing 9 where it engages the short end of a bell-crank lever 37, that is pivoted to the casing 9 at 38. On the outer end of the lever 37 reststhe verticallymoving controller-bar 40, the position of which gages the admission of the heated or heating fluidsto the machine. This bar may take several forms, the essential feature of The 'lug42, is somewhat narrower than the slot 41 and its throw is adjusted so that it will'alternately engage the opposite walls 41 of the slot 41 with a free interval. The con-' the 0011- While I prefer the connections shown in Fig. 11 as simpler, I will now describe 4, Fig. 5, and Fig.v 6. The controller-bar is provided with longitudinal guide-slots 45,- into which the guide-blocks 46 and 47 proeject. The block 46 is pivoted upon an arm 48,

-This valve is preferably of the disk type, al-

though other types of valves may be used. It is provided with openings 55in a valvedisk 56, that are adapted to register with similar openings 57 in the valve-seat when steam is admitted and with the solid part of the valve-seat when steam is cut off. The valve 43 has connected with it the admission-pipe 57 and the discharge-pipe 58 and is provided with the stuffing-box 59.

Returning to the controller-bar 40, thelug 42, operating thereon, is carried by one arm of a bell-crank lever 60, that has the same pivotal center as the block 48. A l nk 61 connects the other arm of the lever to a crank-pin 62.. This pin is adj'ustably secured to a shaft 63 by means of adjustingscrews 64, bearing against a lug 65, that projects into a recess 66 in the head of the shaft 63. (See Figs. '2, 15, and'16.) The lug 65 and pin 62 are preferably cast integral with a plate 67, that is connected to the shaft by a screw 68. The shaft 63 has hearings in the casing 9 and is provided with a driving- 'ul' ley 70. By reference to Fig. 4 it wil be seen that as the shaft 63 revolves the crankpin 62 will give an oscillating movement to the beveled lug'42.

In practice the movement of the lug adjusted to compensate for all play the slots 41 and 48 and the intervening joints between the valve 43, so as to impart a barely-perceptible impulse of the valve at each stroke. It is obvious that under these conditions the slightest displacement of the vertical controller-bar 40 up or down will by the action of the lug 42 on its inclined walls 4] deflect the controller-bar and partially rotate the steam-valve to admit or cut off steam as required. To compensate -for heavy irregularities in the steam-pressure or in the flow of the fluid through-the machine, the inclined section of the bar 40 and connections to the steam-valve ,are proportioned so that a maximum displacement of thecoritroller-bar in a certain direction will throw the steamvalve from closed to full open and conversely. The displacement of .the controller-bar is caused by thervarying temperature of the fluidpassing through the pipe 10 and hollow column 22.

By referring to Figs. 2, 3, and 4 it will be seen that the weight of the controller-bar 40,

resting on the bell-crank lever 37, exerts a tension on the column 22, acting through the arm 3 4 and armed spindle 20. A greater expansion of the column 22 than of the pipe 10 thus forces the arm 34 outward, which, acting on the lever 37, raises the controller-bar 40. Conversely, an excessive contraction of the column 22 allows'the bar 40 to drop.

The cooperating parts of the instrument are roportioned so that a change of position of t 'e bar 40 from one extreme of the incline to the other involves a variation of a few degrees, but induces an extreme valve-action.

- chine, less the heat lost byradiation and condensation by changingthe position of the inclined plane bar independent ofthe expansio'n-columns22 and 1.0. When, for example, the parts are proportioned so that'at a'temperature of 160 Fahrenheit the relative expansion of the columns 10 and 22 is such that the inclined plane is exactly central to the oscillating lug 40, it follows that if the plane is now raised'or lowered independently of the columns 10 and 22 the .instrument will adjust. itself" to a higher or lower temperature, Prespectively. The adjustment may. be interposed at any point between the columns and the bar 40; but-for the .sake of simplicity I prefer to arrange-the adjusting connection between the arm' 34 and tailpiece 32.

, In Fig, 11 I have shown a, preferred construction of the connections between the operating crank-shaft 63, bar 40,and valve 43. The link61 is here shown connected directly to a vertical link 71, that is connected, to the valve-arm 53 and is provided with the lug 42. The bar; 4Ojinstead ofbeing guided by the slots 48 is guided between parallel walls 72 and 73 of'the casing 9 and is provided with guiding eribs 74. The inclined slot 41 is continuous with the parallel slots 48, and thus' admitsof agreater movement of "the bar. In

the, position shown the steam-valve will be closed; but as the temperature drops the bar willdrop, until the inclined plane of the slot 'ement with the lug 42 upon the oscillating n 71, when 'the'movement of the lower part of the link will be temporarily 'arr'fsted and; the motion will be transmitted to the upper'part,-' which then will open the steam-valve, after which the lug 42 will be oscillating between the inclined walls 41 of the slot'41' ready to throw the valve in either direction with a change of temperature. In t ig case link 71 pnly, and not thebar 40, is deflected horizontally to move the valve 43;

ion 81 and rack 82 or an equivalent to but in Figs. 3 and 4 the bar 40 itself is deflccted around the pivot 47 to move the arm 48, which in turn moves the valve 53.

' In Fi 12, represents the inlet-pipe for the flui to be treated nthe machine. A valve or damper 76, adapu .l to interrupt the flow of the fluid into the machine, is arranged within the pipe 75. An arm 77 is secured to the stem of this valve and is connected to the steam-valve 43 by a link 78. In this way when more steam is turned on the flow of fluid intothe machine is simultaneously reduced. This is principally of use in pasteurizing-machines of poor heating capacity or where abnormal changes of steam-pressure or fluidsupply occur.

- In attaching the instrument, to machines not provided with a thermometer I prefer to make it self-indicating, as shown in- Figs.- 9 and 10. The bell-crank 37 then takes the form of a sector or disk 80, and its connection to the arm 34 is preferably by means of a pinpermit a wider range 'of movements.

A graduated scale or dial 82 is arranged on the face of the disk 80, and I also providemeanswhereby the instrument may be adjusted to the desired temperature by moving a pointer'over the'dial to'the desired de ree,

- after which it will adjust itself and contro the temperature at that degree. An arm 84, having a sleeve 85 extending outside the casing 9 and being there provided with an opersiting-knob 86, is journaled on the pm 38.

The sleeve 85 turns on the hub 87 of the disk between a shoulder 88 and a check-nut 89, by

which la-ttenthe arm 84 is secured to the-dis 80. The arm-84 has a lug 89 projecting over the periphery ofthe disk 80, and a flexible strap 90-is secured to the lug 89 and, resting on the periphery ofthe disk is fastened to i the lower end of-the contro ler-bar,'40. A

pointer 91 is connected to the arm 84and is 1 arranged to coincide with the central part of theinclinedslot 41 of the bar 40. A station- 'ary'pointer 93 (see Fig. 9 and Fig. 14) is rovided on thecasing 9,. by wbich the dia '82 maybe adjusted to indicate the correct tem ".peratur'e by means of the screw 94 at the top of the instrument. I

A glass pane'95 is providedint the front The pulley is concator-may be read.

g-the opstantly driven at a slow speed duri" 'wall of the casing 9, through which the indieration of the machine and may be driven by 1 2o 'lings 11 and 12 are'unscrewed and the'clamp. 14 released, after which the pipes may be removed from the instrument and by removing 1 2 5 the pin 23 the inner column 22 may be re moved for cleaning. i

It is obvious that various modifications may be made without departing from the principle of the invention. I 0 not, there-' outflow-pipe in a horizontal fore, wish to confine myself strictly to the construction shown.

While I have shown the outflow-pipe 10 in a vertical position to adapt it to a certain class of machines, for various fluid-treating machines it may be necessary to place the p position and arrange the parts accordingly.

I claim as my invention- 1. The combination, with a suitable receptacle, means for supplying thereto a fluid, to

be tempered, and means forsupplying thereto a tempering fluid, of a valve controlling the admission of said tempering fluid, an cecentric, connections between the said eccentric and the said valve, and means controlled by the temperature of thefluid in said reee tacle for causing said eccentric to move t e valve to an extent proportioned to the degree said temperature varies from the temperature desired.

v 2.. The combination, with a pasteurizer and means for supplyin a heat ng fluid thereto, of a valve control ing. the admission of said heating fluid, means for admitting a fluid to be treated, a controller-bar provided with a slot having inclined walls, aconneetion between said controller-bar and said 1 valve, a thermostatic column acted upon by the temperature of the fluid being-treated, a-

connection between the thermostatic column and the controller-bar, and an oscillating lug engaging the slot in the controller-bar.

3. The combination, with a fluid-temper ing receptacle, means for supplying a tempering fluid thereto andmeans for supplying thereto a flu-id to be treated, of a valve controlling the flow of the fluid under treatment,

' a controller provided with inclined'planes, an

oscillating part engaging the said planes, connections between the said oscillating part and the said valve, a thermostatic column acted upon by the temperature of the fluid under treatment and connections between the said column and the said controller.

' 4. The combination, with apasteurizer and means for supplyin a heating fluid thereto, of a valve control ing the admission of saidheating fluidka power-o erated oscillating) device for moving said va ve, a connection e-tween the said valve and the said oscillatin -device, anda thermostatic column control ing the connection between said valve andsaid device.

5. The combination, with a pasteurizer and .means for supplying a heating fluid thereto, of a'valve controlling the admission of said heating fluid,- power-operated mechanism for moving said valve, an inclinedcontroller-bar forming a connection between said mechanism and said valve, ;and a therthereto, of a valve controlling the admission of said heating fluid, a controller-bar provided with an inclined slot connected with said valve, a power operated oscillating lug engaging said slot,anda thermostatic column governing the position of said bar.

7. The combinatlon, with a suitable receptacle and means for supplying a temperin fluid and a fluid to be ,tem ered to the sai receptacle of valves contro ling the flow of fluids within the said receptacle, a powerdriven oscillating device and means controlled by the temperature of the contents of said receptacle to cause the said oscillating device to move the said valves in either direction' to an extent proportional to the de gree the temperature of said contents varies from thetemperature desired.

8; The combination, with a fluid-tempering receptacle and means for supplying thereto a tempering fluid and a fluid to be tempered, of a thermostatic column acted upon by the tempered fluid, a valve contr l ling the flow of fluid, withinthe receptacle,

an oscillating device, a controller-cam acted upon by the said device, means controlled by the thermostatic column and cooperatin with the said oscillating device and the sai cam to gradually move the valve in either direction and means for adjusting the extent of the movement of the said valve.

9. The combination'with a pasteurizer or other fluid-treating machine and means for supplying thereto a tempering'flu-id, of columns of unequal expansive power, exfiosed to the tempered fluid, a valve for contr'o ing the admission of the fluid to be tempered, means for sup lying a fluid to be treated, an inclined p ane, a moving body adapted to come in contact with the said plane, connections between the said columns and the said inclined plane, and between the said moving body and the said admission-valve whereby the difference 1n expansion and contraction of the said columns operates to vary the relative positions of the said moving body and the said inclined plane and to move the said admission-valve.

l0. Thecombin'ation, with a pasteurizer or other fluid-treating machine and means for supplying thereto. a tempering fluid and means for supplying a fluid to be treated, of

columns of unequal expansive power, means for exposing the said columns to the heating or cooling influences of the treated-fluid, an

inclined plane, means for moving the said plane by the said columns, a moving body adapted to come in contact with the said plane, valves to control the admission of the fluids and connections between-the said in-' 'clined plane, the said moving body and the said admission-valves whereby the said valves are operated when the inclined. plane is moved. y

11. The combination, with a fluid-tempering receptacle and means for supplying thereto a tempering fluid and a fluid to be tempered, of a t ermostatic column acted upon by the tempered fluid, a valve controlling the flows oi the fluid, within the receptacle, an oscillat ing device, means controlled by the thermostatic column and cooperating with the said oscillating device and the said cam to gradually move the valve in either direction'and an indicator adjustably connected to said cam.

1-2. The combination, with a fluid-temper- .ing receptacle and means for supplying thereto atempering fluid and means for supplying a fluid to be treated, of a thermostatic column acted upon by thetem'p'ered fluid, a valve controlling the flow of the tempering fluid within the receptacle, a driving-wheel, an oscillating device connected to the said wheel, a controllercam provided with inclined and parallel planes and acted upon by thesaid oscillating device, connections between the said device and the said valve, and connections between the said controller-cam and the thermostatic column. V 13. The combination, with a fluid-tempering' receptacle and means for' supplying a tempering fiuid and a fluid to be tempered, of a thermostatic column acted upon by the tem pered fiuid',a valve controlling the flow of the. fluld within the receptacle, a driving-wheel, anoscillating device connected to 'thesaid v wheel, and to the said valve, a cam controlled 1 by the thermostatic column and provided with inclined and parallel planes, said oscillating device acting upon the said planes, an indicator, ad ustable connections of the said ine dicator to the said cam and an adjustingpointer for'adjustingthe temperature of the contents of the receptacle to the degree desired. 14. The combination, with a fluid-tempering receptacle and means for supplying thereto a tempering fluid and a flui to be tempered, of a thermostatic column acted upon by the tempered fluid, a controllingram provided with inclined and parallel planes, adjustable connections between the said cam and the said thermostatic column, a power-driven oscillating device actlng upon the said cam, a valve, and connections between the said valve and the said oscillating device.

15, ,In a heatcont roller, thecombinationwitha pipe 10, of a column 22, having a different coefficient of expansion, supported within the pipe 10 by means of the pin 23 and.

In witness whereof I have hereunto set my hand this9thday'of November, 1904. JAMES JESSEN.

' Witnesses:

' O. G. HANSON,

, C. MACNAMARA.' 

